Aggregate Frequency Width, Nuclear Hyperfine Coupling and Jahn-Teller Effect of $Cu^{2+}$ Impurity Ion ESR in $SrLaAlO_4$ Dielectric Resonator at $20$ Millikelvin

• URL: http://arxiv.org/abs/2403.16315v1
• Date: Sun, 24 Mar 2024 22:40:36 GMT
• Title: Aggregate Frequency Width, Nuclear Hyperfine Coupling and Jahn-Teller Effect of $Cu^{2+}$ Impurity Ion ESR in $SrLaAlO_4$ Dielectric Resonator at $20$ Millikelvin
• Authors: M. A. Hosain, J. -M. Le Floch, J. Krupka, M. E. Tobar,
• Abstract summary: impurity paramagnetic ion, $Cu2+$ substitutes $Al$ in the $SrLaAlO_4$ single crystal lattice. The anisotropy of the hyperfine structure reveals a characteristics of static Jahn-Teller effect.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The impurity paramagnetic ion, $Cu^{2+}$ substitutes $Al$ in the $SrLaAlO_4$ single crystal lattice, this results in a $CuO_6$ elongated octahedron, the resulting measured g-factors shows four-fold axes variation condition. The aggregate frequency width of the electron spin resonance with the required minimum level of impurity concentration has been evaluated in single crystal $SrLaAlO_4$ at $20$ millikelvin. Measured parallel hyperfine constants, $A_{\scriptscriptstyle\parallel Cu}$, were determined to be $-155.7\times10^{-4}~cm^{-1},~ -163.0\times10^{-4}~cm^{-1},~ -178.3\times10^{-4}~cm^{-1} $ and$~-211.1\times10^{-4}~cm^{-1}$ at $9.072~GHz~(WGH_{4,1,1})$ for the nuclear magnetic quantum number $M_I=+\frac{3}{2},+\frac{1}{2},-\frac{1}{2}$,~and$-\frac{3}{2}$ respectively. The anisotropy of the hyperfine structure reveals a characteristics of static Jahn-Teller effect. The second-order-anisotropy-term, $\sim (\frac{spin-orbit~coupling}{10D_q})^2$, is significant and can not be disregarded, with the local strain dominating over the observed Zeeman-anisotropy-energy difference. The Bohr electron magneton, $\beta=9.23\times 10^{-24} JT^{-1}$, (within $-0.43\%$ so-called experimental error) has been found using the measured spin-Hamiltonian parameters. Measured nuclear dipolar hyperfine structure parameter $P_{\scriptscriptstyle\parallel}=12.3\times10^{-4}~cm^{-1}$ shows that the mean inverse third power of the electron distance from the nucleus is $\langle r^{-3}_q\rangle\simeq 5.23$ a.u. for $Cu^{2+}$ ion in the substituted $Al^{3+}$ ion site assuming nuclear electric quadruple moment $Q=-0.211$ barn.

Related papers

• Spectroscopy, Crystal-Field, and Transition Intensity Analyses of the C$_{\rm 3v}$(O$^{2-}$) Centre in Er$^{3+}$ Doped CaF$_{2}$ Crystals [0.0]
  We present detailed absorption and laser site-selective spectroscopy of the C$_rm 3v$(O$2-$) centre in CaF$$:Er$3+$. The transition has a low-temperature inhomogeneous line of 1 GHz with hyperfine structure observable from the $167$Er isotope.
  arXiv  Detail & Related papers  (2024-09-23T23:52:40Z)
• Analytical Correlation in the H$_{2}$ Molecule from the Independent Atom Ansatz [49.1574468325115]
  The total energy functional correctly dissociates the H-H bond and yields absolute errors of 0.002 $rA$, 0.19 eV, and 13 cm-1$ relative to experiment at the tight binding computational cost. The chemical bond formation is attributed to the Heitler-London resonance of quasi-orthogonal atomic states with no contributions from kinetic energy or charge accumulation in the bond.
  arXiv  Detail & Related papers  (2024-05-20T21:21:42Z)
• Rigorous ESR spectroscopy of $Fe^{3+}$ impurity ion with oxygen vacancy in ferroelectric $SrTiO_3$ crystal at 20 mK [0.0]
  Impurity $Fe3+$ ion electron spin resonance (ESR) spectroscopy has been performed with a tuneable DC magnetic field of up to $1.6T$. The change of $Fe3+$ ion center-symmetry in the $FeO_6$ complex as a soft-mode characteristics of ferroelectric phase transition.
  arXiv  Detail & Related papers  (2024-03-24T21:08:31Z)
• Ion-molecule reactions below 1~K: Observation of a strong enhancement of the reaction rate of the ion-dipole reaction He$^+$+ CH$_3$F [55.41644538483948]
  Reaction between He$+$ and CH$_3$F forming predominantly CH$+$ and CHF$+$. To avoid heating of the ions by stray electric fields, the reaction was observed within the orbit of a highly excited Rydberg electron.
  arXiv  Detail & Related papers  (2021-12-22T17:32:43Z)
• From quartic anharmonic oscillator to double well potential [77.34726150561087]
  It is shown that by taking uniformly-accurate approximation for anharmonic oscillator eigenfunction $Psi_ao(u)$, obtained recently, it is possible to get highly accurate approximation for both the eigenfunctions of the double-well potential and its eigenvalues.
  arXiv  Detail & Related papers  (2021-10-30T20:16:27Z)
• Rovibrational structure of the Ytterbium monohydroxide molecule and the $\mathcal{P}$,$\mathcal{T}$-violation searches [68.8204255655161]
  The energy gap between levels of opposite parity, $l$-doubling, is of a great interest. The influence of the bending and stretching modes on the sensitivities to the $mathcalP$,$mathcalT$-violation requires a thorough investigation.
  arXiv  Detail & Related papers  (2021-08-25T20:12:31Z)
• Power-like potentials: from the Bohr-Sommerfeld energies to exact ones [77.34726150561087]
  Bohr-Sommerfeld Energies (BSE) extracted explicitly from the Bohr-Sommerfeld quantization condition are compared with the exact energies. For physically important cases $m=1,4,6$ for the $100$th excited state BSE coincide with exact ones in 5-6 figures.
  arXiv  Detail & Related papers  (2021-07-31T21:37:50Z)
• Precision measurement of the $^{43}$Ca$^{+}$ nuclear magnetic moment [0.0]
  We report precision measurements of the nuclear magnetic moment of textsuperscript43Catextsuperscript+. The measurement is not corrected for diamagnetic shielding due to the bound electrons. We use our $mu_I$ value in combination with previous results, to extract the change in shielding constant of calcium ions due to solvation in D$$O: $Delta sigma = -0.00022(1)$.
  arXiv  Detail & Related papers  (2021-05-21T13:44:01Z)
• Precise determination of low energy electronuclear Hamiltonian for LiY$_{1-x}$Ho$_{x}$F$_{4}$ [0.0]
  We use optical spectroscopy methods to measure the lowest crystal-field energies of the rare-earth quantum magnet LiY$_1-x$Ho$_x$F$4$. We are able to observe energy level splittings due to the $6mathrmLi$ and $7mathrmLi$ isotopes, as well as non-equidistantly spaced hyperfine transitions.
  arXiv  Detail & Related papers  (2020-12-16T19:56:38Z)
• Ab initio properties of the NaLi molecule in the $a^3\Sigma^+$ electronic state [0.0]
  We calculate the electronic and rovibrational structure of ultracold polar and magnetic molecules with spectroscopic accuracy. We show that quantum chemistry methods are capable of predicting scattering properties of manyelectron systems.
  arXiv  Detail & Related papers  (2020-03-26T17:39:46Z)
• Hyperfine and quadrupole interactions for Dy isotopes in DyPc$_2$ molecules [77.57930329012771]
  Nuclear spin levels play an important role in understanding magnetization dynamics and implementation and control of quantum bits in lanthanide-based single-molecule magnets. We investigate the hyperfine and nuclear quadrupole interactions for $161$Dy and $163$Dy nucleus in anionic DyPc$.
  arXiv  Detail & Related papers  (2020-02-12T18:25:31Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.